One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,9)(5,8)(7,12)(10,14)(11,16)(13,15)(17,18)(19,26)(20,28)(21,23)(22,25)(24,29)(27,31)(30,32)(33,34,39,43)(35,40,44,47)(36,41,45,46)(37,38,42,48)(2,3)(7,9)(8,10)(15,16)(17,19,22,21)(18,23,25,26)(20,27,29,30)(24,31,28,32)(33,35,39,44)(34,40,43,47)(36,37,45,42)(38,46,48,41)(2,3)(7,9)(8,10)(15,16)(20,29)(24,28)(27,30)(31,32)(35,44)(36,45)(40,47)(41,46) involution — undirected(1,3,6,2)(4,9,12,7)(5,8,14,10)(11,15,13,16)(17,20)(18,24)(19,27)(21,30)(22,29)(23,31)(25,28)(26,32)(33,36,39,45)(34,41,43,46)(35,37,44,42)(38,47,48,40)(1,4,6,12)(2,7,3,9)(5,13,14,11)(8,16,10,15)(17,21,22,19)(18,23,25,26)(20,30,29,27)(24,31,28,32)(33,37)(34,38)(35,45)(36,44)(39,42)(40,46)(41,47)(43,48)(1,5,6,14)(2,8,3,10)(4,11,12,13)(7,15,9,16)(17,18)(19,23)(20,28)(21,26)(22,25)(24,29)(27,32)(30,31)(33,38)(34,42)(35,46)(36,40)(37,43)(39,48)(41,44)(45,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.